Motorized hauling and dumping vehicle



July 21, 1942. R. A. CHADVV I CK, JR 2,290,738

MOTORIZED HAULING AND DUMPING VEHICLE Filed April 1, 1940 3 Sheets-,Sheet 1 z 1 a g 15 14 Z /6 J I V ATTORNEY.

July 21,. 194-2. R. A. CIHADWICK', JR 2,290,738

MOTORI ZED HAULING AND DUMPING VEHIEJLE Filed April 1, 1940 SSheets-Sheet 2 I 6?) T a; K I 0 3 INVENTOR.

HUZJFE H.5hEJ/1ZZEIQJH.

LA MA ATTORNEY.

y R. A. CHADWICK, JR v 2,290,738 I MOTORIZED HAULING AND DUMPING VEHICLE Filed April 1, 1940 3 Sheets-Sheet 3 1N VENTOR.

Hubf'l'fifhsdmck JR BY m Q MA ATTORNEY.

Patented July 21, 1942 UNlTED STATES PATENT: OFFICE- MOTORIZED HAULING AND DUMPING VEHICLE Robert A. Chadwick, Jr., Milwaukee, Wis. Application April 1,1940, Serial No. 327,126

3 Claims. (CL 214-77) This invention relates to an improvement in motor vehicles of the truck type designed for transporting and handling material, such, as dirt, stone, gravel, or any other similar material.

The invention of skips or truck bodies so that certain of the skips or bodies maybe loaded while the truck is transporting others from one place to another. I One of the principal objects of the invention is to provide a motor-driven vehicle of this character, which is simple though strong and rugged in construction, reliable, effective. and rapid'in operation, and easy and comparatively inexpensive to manufacture, install, and maintain Another objectof the invention is to provide a motor vehicle of this character and having these advantages, and which exercises a smooth and complete control over the skip at all times, namely when the loaded skip is being hoisted into position on the truck for transportation and when it is being moved be of the truck and dumped or discharged at the point of de-' posit of the material.

A further object of the invention is to provide a motor-driven'vehicle of this character in which the means for hoisting and dumping the skips or removable truck bodies is power-operated, preferably hydraulically operated, and wherein the control over the power means is simple and convenient.

Other objects and advantages reside in-certain novel features of the construction, arrangement, and combination of parts, which will be hereinafter morefully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification, and in which: l

Figure 1 is a view partly in side elevation and partly in vertical cross section, taken on line l-| of Figure 2 and illustrating a motor-driven truck constructed in accordance with the present invention, a portion of the skip being broken away to better illustrate the manner in which the fluid pressure motor is combined with the means employed for hoisting and lowering the skip.

Figure 2 is a fragmentary view in top plan further illustrating the construction shown in Figure 1, the skip being omitted for. the sake of illustration.

Figure 3 is a diagrammatic view, partly in ele is'of the type wherein a motordriven truck is designed to handle a plurality vation and partly in section, illustrating a fluid pressure motor for actuating means which hoists and lowers the skip, and showing diagrammatically one way in which its motor may be powered and controlled.

Figure 4 is a fragmentary view in side elevation showing the skip in the position which it occupies when it is about to be hoisted on to the truck. i p

, Figure 5 is a fragmentary view in top plan showing a modified form of the invention.

Figure 6 is a fragmentary view inside elevation further illustrating the modification shown in Figure 5. I 1

Figure '7 is a diagrammatic view, partly in side elevation and partly in longitudinal, vertical cross section, illustrating still another form of the invention.

Figure 8 is a view in rear elevation illustratin a mechanism which may be employed to control the dumping of the skip; and

Figure 9 is a diagrammatic view in side elevation of the structure shown in Figure 8.

,Referring to the drawings, the numeral l0 designates generally a motor-driven truckwith which the mechanism constituting the present invention is combined. The truck may be of any standard or conventional structure, and has the usual chassis H supported on wheels I2. It

is powered by the usual engine l3, and ordinarily will be equipped with a cab I4. Supported on and securely bolted. down or otherwise fastened to the chassis of the truck is a suitable frame or platform 15.

Means is provided on the truck for hoisting loaded skips on to the body thereof and for lowering and depositing or dumping the skip at the place of deposit.

In all forms of the invention, this means includes a main shaft it supported for rotation in bearings 11 supported upon and fastened to the platform l5. In the constructions illustrated, the shaft l6 extends transversely of the platform l5 adjacent the rear end of the truck.

' Booms l8 are fixed to the shaft I6, there being one boom adjacent each end of the shaft. The

booms are in the form of lever arms of suitable length and it is at their inner ends that they are secured to the main shaft l6. At their outer ends the booms ii! are connected by a cross shaft or cross member l9, the ends of which are fixed in suitable openings provided therefor in the booms. In the drawings only one skip, designated at 20; is illustrated, but it is to be understood that the present invention proposes to proupon the conditions, and that the skips are to be successively employed. In order that the skips may be hoisted, handled, and dumped by the booms, supporting chains 2| are attached to the cross shaft [6, and at their lower ends have eyes or hooks 22 designed to be releasably secured to outwardly projecting trunnions 23 provided on the side walls of each skip.

The shaft l6, its pair of booms l6, cross member l9, and chains 2|, provide in each form of the invention a cradle-type derrick for the skips or bodies 20. While preferably the cradle-type derrick thus provided works over the rear end of the truck, obviously the elements could be rearranged to work over the side of the truck.

In all embodiments of the invention power means is provided to swing the booms l8 back and forth so as to hoist the skips 26 on to the platform l and lower them therefrom on to the ground or to dump them. may take various forms.

In the form of the invention shown in Figures 1 to 4, inclusive, "a fluid pressure motor, designated generally at 25, is provided.' The motor 25 comprises a cylinder 26 havingv a head 21 at Such power means likewise, frame l5, skip 20,

one end thereof formed with an integral lu'glike extension 28. A bearing 29 is provided in the lug-like extension 28 and receives a short supporting, shaft 30 carried by the frame and serving the purposeof supporting the cylinder 26 of the fluid. pressuremotor on the frame 15 for swinging or oscillating movement about a fixed axis. A piston 3| is fitted in the cylinder 26 for reciprocatory movement, and has a piston rod 32 secured thereto and projecting through a stuffing box 33 provided in the head of the cylinder opposite its swingable support. The piston rod 32 is pivotally interconnected at its outer end with a wrist-pin 34, which in turn is pivotally mounted or otherwise suitably combined with crank arms 35 fixed to and rotatable with the main shaft H3.

The motor 25 is a double-acting fluid pressure motor. Supply and exhaust of fluid under pressure to the opposite ends of the cylinder 26 is had by virtue of provision of pressure lines 36 and 3'! leading to the opposite ends of the cylinder from a distributing or control valve, designated generally at 38. Pressure lines 39 and 40 lead to the control valve from a pump 4|. The

pump 4| draws its motor fluid from a suitable reservoir 42, and it is actuated. from the engine of the truck by virtue of theprovision of the power take-off 43, which acts through suitable motion transmission mechanism, such as beveled gear 44, shaft 45, and belt and pulleys 46, to rotate thedriving shaft of the pump H. The

valve 38 may be conveniently controlled from the cab of the truck by virtue of the provision of a control lever 56 in the suitable system of links and levers represented diagrammatically at 5| operatively interposed between the control lever and the valve 38. The distributing or control valve 38 is of conventional construction and is only diagramatically illustrated as its action is well understood by those skilled in the art. The.

' valve is shown in neutral position wherein it locks the fluid in the cylinder 26. If shifted to the right from the position shown in Figure 3, it supplies fluid under pressure to cylinder 26 through pressure line 31, and exhausts it through line 36. If shifted to the left from the position shown in Figure 3 the valve 38 directs the fluid under pressure to cylinder 26 through a motor truck from the booms by the chains 2|.

-vide a plurality of skips, the number depending pressure line 36 and exhausts it through pressure line 31.

With this construction, when a loaded skip is up to the skip 20 to be picked up. The chains 2! are then attached to the trunnions of the skip 26. Following this the control valve .38 is manipulated to cause the fluid pressure motor 25 to swing the booms l8 up to the position shown in Figure 1, thereby hoisting the skip 20 on to the"- frame or platform I5. The platform l5 supports the skip 20' at a point well in advance of the rear axle of the truck, A reverse actuation of the motor 25 at the point of deposit will be effective to deposit or dump the skip.

In the construction illustrated in Figures 5 and 6 a motor truck I0 is provided as before; booms I8 carried by 20 being suspended v In this form of the invention, however, in lieu of having the single pressure motor operatively interconnected with the booms by means "of a crank combined with the main shaft l6, two fluid pressure motors, designated at 55, are provided, one being provided at each side of the machine, and these motors are of identical construction and each has a cylinder 56 swingably connected as at 51 to the frame IS. The usual piston is combined with the cylinder 55 of each fluid pressure motor and has a piston rod 51 which is pivotally interconnected with a gusset plate 58 fixed to the adjacent boom I 8. In this form of the invention the motors are directly and operatively interconnected with the booms IS without the interpositioning of any motion transmission mechanism.

In the form of the invention shown in Figure 7 I0 is provided as before, likewise booms l8 and skip 20, and the skip is suspended from the boom by means of chains 2|. In this form of the invention, however, a different type of means is employed for swinging the boom, and comprises a transmission 60, powered by the engine of the truck and acting through belt and pulley 6| to drive a Worm shaft 62. The worm shaft 62 is equipped with a worm 63 which meshes with the worm wheel 64 fixed to the main the main shaft [6, the skip shaft l6. The worm and worm wheel are reversible in their action so that the motor is effective to hoist and dump the skip. In this form of the invention the skip is'automatically dumped by attaching tie chains 65 to the lower portion of the skip 28 and releasably securing such chain 65 to intermediate portions of the booms. Similar tie chains may be provided with .the other embodiments of the invention shown in Figures 1 to 6, inclusive, if desired.

In the form of the invention shown in Figures 8 and 9 the truck I6 is provided as before and is equipped with the platform 15 on which shaft I6 is supported in bearings I1, The shaft l6 carries the booms l8 from which the skip 26 is suspended by the chains 2 I. In this form of the invention a means somewhat different from the tie chains 65 is provided to control the dumping of the skip. The means shown in Figures 8 and 9 consists of a latch 10 pivoted to each boom l6 and disposed, in its latching position, in overlapping engagement with one wall of the skip, as shown in Figures 8 and 9. The latches are biased by springs II to latchin position, and in latching position engage stop pins 32 carried by the skip. The latches may be released from a point of convenient control by virtue of the provision of a hand lever 13 fulcrumed adjacent the control station and connected by a system of cables or flexible element 14 and pulley 75 to the latches. The operator by pulling on the hand lever it may swing the latches to a position where they disengage the skip 20, thereby allowing the skip to swing freely. Reverse movement of the hand lever permits the latches to return to latching position under the influence of their biasing springs. When the latches are in latching positions, and boom i8 swing to lower the skip toward the ground, the skip is automatically dumped.

While the apparatus above described may be very advantageously used for handling skips in the manner pointed out, the present invention also contemplates the use of this apparatus for handling loads other than skips, and in some instances a crane-like derrick may be employed to lift loads off of the ground and deposit them on the platform ofthe vehicle, or even in a fixed vehicle body. One of the advantageous features of the invention resides in the fact that the crane-like derrick may be utilized to pick up a load from the ground and deposit it on the vehicle platform ahead of the transverse shaft which actuates the booms.

While I have shown and described several constructions in which the invention may be ad- 'vantageously embodied, it is to be understood that the constructions shown have been selected merely for the purpose of illustration or example, and that various changes in the size, shape, and arrangement of the parts may be made without departing from the spirit of the invention or the scope of the subjolned claims.

I claim:

1. An automatic load hauling and dumping vehicle of the character described comprising a loading and unloading boom assembly mounted adjacent the rear end of the chassis of the vehicle and including a rigid rectangular frame, one side of said frame also constituting the operating shaft of the boom assembly and being disposed transversely of the chassis ofthe vehicle and pivotally supported thereon, the opposite side of the frame from said shaft constituting a cross member for supporting loads and for stiffening the assembly, the other two sides of the frame constituting the lifting armson the boom assembly, a reversible poweroperating mechanism for said boom assembly controlledat will and being operable to swing said boom as sembly through an are sufficient to move the outer cross member thereof to a position overlying the ground beyond the end of the vehicle chassis and also to a position overlying the vehicle chassis at a. point ahead of the operating shaft of the boom assembly, in combination with a load container or skip, means suspending the skip in a swinging position from the cross member of the boom assembly and between the lifting members thereof, and means utilizing the swinging movement of said lifting arms to effect automatic dumping of the skip when the boom assembly is swung in one direction.

2. An automatic load hauling anddumping ve; hicle of the character described comprising a loading and unloading boom assembly mounted adjacent the rear end of the chassis of the vearm suincient to move the outer cross boom thereof to a position overlying the ground beyond the end of the vehicle chassis and also to a position overlying the vehicle chassis at a point ahead of the operating shaft of the boom assembly, in combination with a load container or skip, means suspending the skip in a swinging position from the cross member of the boom assembly and between the lifting members thereof, and tie chains releasably interconnecting the skip and booms for effecting 'automatic dumping of the skip.

3. An automatic load hauling and dumping vehicle of the character described comprising a loading and'unloading boomassembly mounted adjacent the rear end of the chassis of the vehicle and including a rigid rectangular frame, one side of said frame also constituting the operating shaft of the boom assembly and being disposed transversely of the chassis of the vehicle and pivotally supported thereon, the opposite side of the frame from said shaft constituting a cross member for supporting loads and for stifiening the assembly, the other two sides of the frame constituting the lifting arms on the boomassembly, a reversible power operating mechanism for said boom assembly controlled at will and being operable to swing said boom assembly through an arm suficient to move the outer cross boom thereof to a position overlying the ground beyond the end of the vehicle chassis and also to a position overlying the vehicle chassis at a point ahead of the operating shaft of the boom assembly, in combination with a load container or skip, means suspen the skip in a swinging position from the cross mem ber of the boom assembly and between the lifting members thereof, and a manually operable latch mechanism cooperable with the skip to effect automatic dumping thereof.

a! da t.

A. CHADR JICK, 

